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【iOS】YYModel的初步学习

news 2025/11/17 20:58:29

YYModel的初步学习

文章目录

  • YYModel的初步学习
    • 前言
    • 与JSONModel对比
    • YYModel的优势
    • 如何使用YYModel
      • 最简单的Model形式
      • 容器类属性
      • 白名单和黑名单
      • Model的嵌套
    • 小结

前言

随着时代的发展，iOS解析JSON数据的第三方库越来越多，原先的JSONModel的性能上的问题逐渐显现，现在我们可以采用更加高效的第三方库YYModel。

与JSONModel对比

时间消耗（在 iPhone 6 上处理 GithubUser 10000 次）：

在这里插入图片描述

这里我们可以看出YYModel的性能其实超过了JSONModel，笔者在下文中仅仅介绍对于YYModel的使用，至于他与JSONModel的源码笔者会之后再进行学习。

YYModel的优势

  • 高性能：转换性能接近手写代码。
  • 自动类型转换：对象类型可以自动转换。
  • 类型安全：将验证所有数据类型以确保在转换过程中类型安全。
  • 非侵入式：无需使模型类继承其他基类。
  • 轻量化：此库仅包含 5 个文件。
  • 文档和单元测试：100% 的文档覆盖率，99.6% 的代码覆盖率。

如何使用YYModel

最简单的Model形式

// JSON:
{"uid":123456,"name":"Harry","created":"1965-07-31T00:00:00+0000"
}// Model:
@interface User : NSObject
@property UInt64 uid;
@property NSString *name;
@property NSDate *created;
@end
@implementation User
@end// Convert json to model:
User *user = [User yy_modelWithJSON:json];// Convert model to json:
NSDictionary *json = [user yy_modelToJSONObject];

我们使用YYModel的时候，只需要按照JSON数据中的名字，然后创建一个对象中设置属性名字和JSON数据中相同，然后我们需要在网络请求中调用yy_modelWithJSON和yy_modelToJSONObject这两个方法。一个是将JSON转化成model数据，另一个则是将model数据转化成NSObject这两个类。

这里我们简单将这段代码放在网络请求中：

-(void)dataLoad {NSString* urlString = @"https://devapi.qweather.com/v7/weather/3d?location=101010100&key=2211750bdc834763ba3c5f57ce98c307";//NSURL* url = [NSURL URLWithString:urlString];[[AFHTTPSessionManager manager] GET:urlString parameters:nil headers:nil progress:^(NSProgress * _Nonnull downloadProgress) {} success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {tryModel* model = [tryModel yy_modelWithJSON:responseObject];NSDictionary* dirty = [model yy_modelToJSONObject];NSLog(@"%@", dirty);} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {NSLog(@"error");}];
}

我们只需要简单结合网络请求和YYModel便可以实现对于JSON数据的一个解析，这里笔者采用了之前用过的和风天气的api

容器类属性

这里先给出我们这里的JSON数据：

{"code": "200","updateTime": "2024-10-08T20:18+08:00","fxLink": "https://www.qweather.com/weather/beijing-101010100.html","daily": [{"fxDate": "2024-10-08","sunrise": "06:18","sunset": "17:47","moonrise": "11:40","moonset": "20:33","moonPhase": "蛾眉月","moonPhaseIcon": "801","tempMax": "23","tempMin": "10","iconDay": "100","textDay": "晴","iconNight": "151","textNight": "多云","wind360Day": "180","windDirDay": "南风","windScaleDay": "1-3","windSpeedDay": "3","wind360Night": "180","windDirNight": "南风","windScaleNight": "1-3","windSpeedNight": "3","humidity": "64","precip": "0.0","pressure": "1010","vis": "25","cloud": "25","uvIndex": "4"},{"fxDate": "2024-10-09","sunrise": "06:19","sunset": "17:46","moonrise": "12:41","moonset": "21:28","moonPhase": "蛾眉月","moonPhaseIcon": "801","tempMax": "20","tempMin": "11","iconDay": "305","textDay": "小雨","iconNight": "151","textNight": "多云","wind360Day": "90","windDirDay": "东风","windScaleDay": "1-3","windSpeedDay": "3","wind360Night": "0","windDirNight": "北风","windScaleNight": "1-3","windSpeedNight": "16","humidity": "24","precip": "1.0","pressure": "1012","vis": "24","cloud": "55","uvIndex": "3"},{"fxDate": "2024-10-10","sunrise": "06:20","sunset": "17:44","moonrise": "13:36","moonset": "22:32","moonPhase": "上弦月","moonPhaseIcon": "802","tempMax": "21","tempMin": "7","iconDay": "100","textDay": "晴","iconNight": "150","textNight": "晴","wind360Day": "0","windDirDay": "北风","windScaleDay": "1-3","windSpeedDay": "3","wind360Night": "225","windDirNight": "西南风","windScaleNight": "1-3","windSpeedNight": "3","humidity": "42","precip": "0.0","pressure": "1010","vis": "25","cloud": "25","uvIndex": "4"}],"refer": {"sources": ["QWeather"],"license": ["CC BY-SA 4.0"]}
}

这里我们可以看到这里的daily里面包含了一个数组，而那个数组里面有包含了另一个Model。所以说这里的JSON数据包含了一个容器类的属性，这里我们需要调用一下+ (NSDictionary *)modelContainerPropertyGenericClass这个方法，这个方法是让我们的NSArray或者NSSet这些容器知道里面的存储的元素是什么对象：

  • 这里注意下让这个类继承YYModel这个协议，否则会找不到这个方法
@interface Model : NSObject
@property (nonatomic, strong) NSString* fxDate;
@property (nonatomic, strong) NSString* sunrise;
@property (nonatomic, strong) NSString* sunset;
@property (nonatomic, strong) NSString* moonrise;
@property (nonatomic, strong) NSString* moonset;@property (nonatomic, strong) NSString* moonPhase;
//@property (nonatomic, strong) NSString* moonPhaseIcon;
@property (nonatomic, strong) NSString* tempMax;
@property (nonatomic, strong) NSString* tempMin;
@property (nonatomic, strong) NSString* iconDay;
@property (nonatomic, strong) NSString* textDay;
@property (nonatomic, strong) NSString* iconNight;
@property (nonatomic, strong) NSString* textNight;
@property (nonatomic, strong) NSString* wind360Day;
@property (nonatomic, strong) NSString* windDirDay;
@property (nonatomic, strong) NSString* windScaleDay;
@property (nonatomic, strong) NSString* windSpeedDay;
@property (nonatomic, strong) NSString* wind360Night;
@property (nonatomic, strong) NSString* windDirNight;
@property (nonatomic, strong) NSString* windScaleNight;
@property (nonatomic, strong) NSString* windSpeedNight;
@property (nonatomic, strong) NSString* humidity;
@property (nonatomic, strong) NSString* precip;
@property (nonatomic, strong) NSString* pressure;
@property (nonatomic, strong) NSString* vis;
@property (nonatomic, strong) NSString* cloud;
@property (nonatomic, strong) NSString* uvIndex;
@end
@interface tryModel : NSObject<YYModel>
@property (nonatomic, strong) NSString* code;
@property (nonatomic, copy) NSArray* daily;
@end
+ (NSDictionary *)modelContainerPropertyGenericClass {return @{@"daily":[Model class]};
}

这里我们可以看到这里的数组里面存储的也是一个Model，所以我们在这个方法里面给他一个字典让这个属性对应Model的这个class，所以我们就可以让他进行一个Model的解析了。下面给出网络请求和YYModel数据结合

@implementation Model
-(void)dataLoad {NSString* urlString = @"https://devapi.qweather.com/v7/weather/3d?location=101010100&key=2211750bdc834763ba3c5f57ce98c307";//NSURL* url = [NSURL URLWithString:urlString];[[AFHTTPSessionManager manager] GET:urlString parameters:nil headers:nil progress:^(NSProgress * _Nonnull downloadProgress) {} success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {tryModel* model = [tryModel yy_modelWithJSON:responseObject];NSDictionary* dirty = [model yy_modelToJSONObject];NSLog(@"%@", dirty);} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {NSLog(@"error");}];
}
@end
@implementation tryModel+ (NSDictionary *)modelContainerPropertyGenericClass {return @{@"daily":[Model class]};
}
@end

打印结果：

    code = 200;daily =     ({cloud = 55;fxDate = "2024-10-09";humidity = 26;iconDay = 305;iconNight = 151;moonPhase = "\U86fe\U7709\U6708";moonrise = "12:41";moonset = "21:28";precip = "1.0";pressure = 1013;sunrise = "06:19";sunset = "17:46";tempMax = 21;tempMin = 11;textDay = "\U5c0f\U96e8";textNight = "\U591a\U4e91";uvIndex = 3;vis = 24;wind360Day = 270;wind360Night = 0;windDirDay = "\U897f\U98ce";windDirNight = "\U5317\U98ce";windScaleDay = "1-3";windScaleNight = "1-3";windSpeedDay = 3;windSpeedNight = 16;},{cloud = 25;fxDate = "2024-10-10";humidity = 40;iconDay = 100;iconNight = 150;moonPhase = "\U4e0a\U5f26\U6708";moonrise = "13:36";moonset = "22:32";precip = "0.0";pressure = 1011;sunrise = "06:20";sunset = "17:44";tempMax = 21;tempMin = 8;textDay = "\U6674";textNight = "\U6674";uvIndex = 4;vis = 25;wind360Day = 0;wind360Night = 225;windDirDay = "\U5317\U98ce";windDirNight = "\U897f\U5357\U98ce";windScaleDay = "1-3";windScaleNight = "1-3";windSpeedDay = 3;windSpeedNight = 3;},{cloud = 25;fxDate = "2024-10-11";humidity = 47;iconDay = 100;iconNight = 150;moonPhase = "\U76c8\U51f8\U6708";moonrise = "14:22";moonset = "23:44";precip = "0.0";pressure = 1015;sunrise = "06:21";sunset = "17:42";tempMax = 23;tempMin = 11;textDay = "\U6674";textNight = "\U6674";uvIndex = 4;vis = 25;wind360Day = 180;wind360Night = 45;windDirDay = "\U5357\U98ce";windDirNight = "\U4e1c\U5317\U98ce";windScaleDay = "1-3";windScaleNight = "1-3";windSpeedDay = 3;windSpeedNight = 3;});
}
Type: Notice | Timestamp: 2024-10-09 10:38:01.586475+08:00 | Process: YYModel | Library: YYModel | TID: 0x12795b1

这里就可以打印出JSON数据

白名单和黑名单

+ (NSArray<NSString *> *)modelPropertyBlacklist {return @[@"updateTime"];
}//这个方法不会处理JSON数据中的这个数据
+ (NSArray<NSString *> *)modelPropertyWhitelist {return @[@"daily"];
}//这个方法会让提仅仅处理JSON中的这个数据

如果实现这两个方法可以让我们获得我们所需要的数据

Model的嵌套

什么也不用做，我们只需要让一个Model的一个属性设置成另一个Model就可以了

例如：

// JSON
{"author":{"name":"J.K.Rowling","birthday":"1965-07-31T00:00:00+0000"},"name":"Harry Potter","pages":256
}// Model: 什么都不用做，转换会自动完成
@interface Author : NSObject
@property NSString *name;
@property NSDate *birthday;
@end
@implementation Author
@end@interface Book : NSObject
@property NSString *name;
@property NSUInteger pages;
@property Author *author; //Book 包含 Author 属性
@end
@implementation Book
@end

小结

本篇文章简单介绍了如何将网络请求中得到的数据转化成我们OC中的对象，方便我们对于数据进行操作处理。


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